[10] leaves ; 21 cm (4to)

Title devised by cataloger. Incipit on A2 recto: Excellentissimi Magistri Alberti de Saxonia tractatus proportionum incipit feliciter

Imprint derived from colophon (C2): Magistri Alberti de Saxonia proportionu[m] libellus finit feliciter qui Uenetiis summa cu[m] diligentia fuit impressus per Bernardinu[m] Uenetu[m] impensa. d. Ieronimi duranti. Die. 29. Zenaro. 1494

Signatures: A-B⁴ C² (A1=blank)

Chancery quarto; A3 recto: 43 lines, 159 x 105 mm; type: 73G; initial spaces with guide letters

COPY NOTE: Boston Public Library (Rare Books Department) copy Q.405.105 with later ink foliation in upper margins. Blind impressions from bearer types on C2. Leaf dimensions: 202 x 150 mm.

PROVENANCE: Boston Public Library (Rare Books Department) copy Q.405.105 with pencil dealer's notes, etc., at front. Early/contemporary marginalia. Purchased in March, 1939.

BINDING: Boston Public Library (Rare Books Department) copy Q.405.105 bound in ca. 19th-century pasteboard wrappers. Front and back flyleaves comprised of manuscript waste (15th-century copy of the Codex Theodosianus, with commentary. Inscribed in lower left corner of upper cover: "ff // I // 75." Blue and green paper labels with lot/library numbers.

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